Home Forums Hunting & Shooting Hunting Rifles Real world differences between the .270win & .270 weatherby?

With the .270 Win, it's a bit hard to use a temperature stable single-base powder such as H4831sc with the 150 grain projectiles and get a decent velocity such as over 3000 fps. This is because the case isn't big enough to hold the larger volumes of slow burning powder such as H1000. With the bigger cases such as the .270 Weatherby, you can load 75-79 grains of H1000 powder to drive the 150's at around 3100 fps. That's the real advantage with the .270 Weatherby, plus a little more reach than the .270 Win if you want to go lighter than 150.